#3F9D2B
Closest named color: Grass Green (#3F9B0B). oklch(61.7% 0.174 140.5), rgb(63, 157, 43).
Aa
Black text reads best on this color (6.06:1).
About this color
#3F9D2B is a medium-dark, vivid green. In OKLCH its lightness is 62%, its chroma 0.174 and its hue 140°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grass Green (#3F9B0B), ΔE 0.015 away. Black text reads best on it, at 6.06:1.
| Hue family | Greens |
| Lightness | medium-dark (62%) |
| Chroma | vivid (0.174) |
| Temperature | in between |
| Nearest name | Grass Green (#3F9B0B) |
| Black text | 6.06:1 |
| White text | 3.46:1 |
Values
| HEX | #3F9D2B |
| RGB | rgb(63, 157, 43) |
| HSL | hsl(109, 57%, 39%) |
| OKLCH | oklch(61.7% 0.174 140.5) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #3F9D2B | 3.46:1 | AA large text | Lc -67.2 | Content text, not long reading |
| Black text on #3F9D2B | 6.06:1 | AA | Lc 42.3 | Non-text elements, placeholder text |
| #3F9D2B text on white | 3.46:1 | AA large text | Lc 61.8 | Content text, not long reading |
| #3F9D2B text on black | 6.06:1 | AA | Lc -39.9 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 500.
-
Step 50
50
#F1F7F0
oklch(97% 0.011 141.3)
-
Step 100
100
#E1EEDF
oklch(93.5% 0.024 141.5)
-
Step 200
200
#C9E1C4
oklch(88.4% 0.047 140.3)
-
Step 300
300
#A3CF9B
oklch(81% 0.085 140.7)
-
Step 400
400
#6FB562
oklch(70.7% 0.136 140.6)
-
Step 500
500 (this color)
#3F9D2B
oklch(61.7% 0.174 140.5)
-
Step 600
600
#248B00
oklch(55.7% 0.181 140.5)
-
Step 700
700
#1C7500
oklch(49.2% 0.16 140.5)
-
Step 800
800
#166000
oklch(42.8% 0.139 140.4)
-
Step 900
900
#174F0A
oklch(37.6% 0.113 140.5)
-
Step 950
950
#102E09
oklch(26.9% 0.071 140.1)
#3F9D2B with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #A18F18 | 0.117 |
| Deuteranopia (no green cones) | #968736 | 0.119 |
| Tritanopia (no blue cones) | #329887 | 0.116 |
| Achromatopsia (no color) | #8A8A8A | 0.175 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F9D2B
#3F9D2B
oklch(61.7% 0.174 140.5)
- #B25CC4
#B25CC4
oklch(61.7% 0.173 320.5)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #3F9D2B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grass Green #3F9B0B ΔE 0.015
- Grassy Green #419C03 ΔE 0.016
- Irish Green #019529 ΔE 0.038
- Mid Green #50A747 ΔE 0.040
- Kelly Green #02AB2E ΔE 0.042
- True Green #089404 ΔE 0.044
- Kelley Green #009337 ΔE 0.044
- Medium Green #39AD48 ΔE 0.046
Use #3F9D2B in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.